The printTest cpp macro does not seem to be being applied in the test suite test enum01.hs (libraries/base)

> ghci -cpp enum01.hs 
GHCi, version 7.8.3: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
[1 of 1] Compiling Main             ( enum01.hs, interpreted )

enum01.hs:91:3: Not in scope: ‘printTest’

enum01.hs:92:3: Not in scope: ‘printTest’

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